Work

Spatial refractive index sensor using whispering gallery modes in an optically trapped microsphere

Year: 2007

Type: article

Abstract: The authors propose the use of an optically trapped, dye doped polystyrene microsphere for spatial probing of the refractive index at any position in a fluid. Using the dye embedded in the microsphere as an internal broadband excitation source the authors eliminated the need for a tunable excitation source. They measured the full width at half maximum and frequency spacing of the transverse electric and transverse magnetic resonances as a function of the refractive index of the immersion fluid. The authors achieved a sensitivity of 5×10−4 in refractive index, even when the exact size of the microsphere was not known.

Source: Applied Physics Letters

DOI: 10.1063/1.2722695

Authors: Peter Zijlstra, Karen L. van der Molen, Allard P. Mosk

Institution: University of Twente

Language: English

Topic: Photonic and Optical Devices

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: bronze

Funders: Stichting voor Fundamenteel Onderzoek der Materie, Nederlandse Organisatie voor Wetenschappelijk Onderzoek

OpenAlex ID: W2000470407